27 #ifndef __GyotoPowerLawSpectrum_H_
28 #define __GyotoPowerLawSpectrum_H_
64 PowerLaw(double exponent, double constant=1.);
73 using Gyoto::Spectrum::Generic::operator();
74 virtual double operator()(double nu) const;
76 #ifdef GYOTO_USE_XERCES
81 virtual void
fillElement(FactoryMessenger *fmp) const ;